Online detecting device for active sulfur in liquid oil

Abstract

The invention relates to an online detecting device for active sulfur in liquid oil. The device comprises a detecting module and a processor module, wherein the detecting module is connected with device oil tanks such as a transformer oil tank, a generator oil tank, an engine oil tank or a speed changing device oil tank and the like, and is used for detecting active sulfur in liquid oil of devices, and the processor module is used for receiving and processing detecting signals output by the detecting module, and controlling the running of the detecting module. According to the online detecting device disclosed by the invention, the online in-time detection on the active sulfur in the liquid oil of the devices can be realized, so that scientific and effective advices can be provided for chances of changing the liquid oil of the devices; and high-pressure device faults caused by the active sulfur contained in the liquid oil of the device or device faults caused by the active sulfur contained in the liquid oil of the device can be reduced, so that the phenomenon of reducing the service life can be reduced.

Description

technical field [0001] The invention relates to the field of sensor detection, in particular to an online detection device for corrosive sulfur in liquid oil. Background technique [0002] At present, the liquid oil used in the power industry is mostly mineral oil refined from petroleum (crude oil). In addition to a large amount of hydrocarbons such as alkanes, cycloalkanes, and a small amount of aromatic hydrocarbons, its components are also accompanied by inherent oils in crude oil. Sulfur, oxygen, nitrogen and other trace elements, among which "corrosive sulfur" is part of the total sulfur composition in oil, and may contain a variety of corrosive sulfur. Including sulfur elements, mercaptans (THIOLS), sulfides (THIO- ETHERS), 2 sulfides (DISULFIDES). [0003] Before the mid-1990s, there were relatively few transformer damages caused by corrosive sulfur worldwide, but in recent years, many high-voltage equipment failures have occurred due to the reaction of corrosive sul...

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Problems solved by technology

[0008] 5. The operating temperature of modern transformers has increased compared with the past. High temperature will cause the originally considered stable sulfide to become unstable and corrosive sulfide; high temperature will also accelerate the oxidation reaction speed, making metal sulfide easier to form. Dissolved in insulating oil, adhered to the surface of copper and insulating paper, causing transformer accidents

This method judges the degree of corrosion of the oil sample by sulfur by observing the color change on the surface of the copper sheet; the oxygen concentration in the transformer oil has no obvious effect on the reaction between dibenzyl disulfide (DBDS) and the copper wire in the oil, but it will affect the vulcanization. Cuprous (Cu 2 S) Adhesion on the surface of copper wire, insulating paper, etc.; Cu 2 S attached will change the surface structure of the copper wire, the fiber distribution of the insulating paper, and lead to a decrease in the dielectric properties of the oil-paper composite insulation, etc.

Although this method can provide an effective laboratory detection method, it cannot guarantee the operation safety of transformers and generators because it cannot carry out real-time online monitoring.

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